Insurers say the application forms from HealthCare.gov have been riddled with all sorts of errors since open enrollment started on Oct. 1 (CNN Money)

The Obama Administration says it fulfilled its promise to get HealthCare.gov working for the vast majority of Americans.

It also says it has made substantial progress in another big problem area -- the accuracy of application forms once they get to the insurer. More than 80 percent of the mistakes on applications were due to one bug that has now been addressed, officials said Monday.

But insurers say they are still seeing many issues with the forms, known as 834s, and that it will take time before they know whether all the problems have been resolved.